As it is in NZ, it is most likely to be a Laurentian. Canadian built and New Zealand assembled - one of about 90 sold here that year. For 1960 it was probably originally powered by a 283 and three on the tree but could by now have a 350 and TH350.

Four years too late but in reply to chevy5 it is unlikely to be a Catalina because the US models were not sold in NZ and it can be seen from thew thumb picture that it has the narrow track of the Canadian models.